單項選擇題In which circumstance are multiple copies of the same unicast frame likely to be transmitted in a switchedLAN?()

A.after broken links are re-established
B.in an improperly implemented redundant topology
C.when upper-layer protocols require high reliability
D.during high traffic periods
E.when a dual ring topology is in use


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1.單項選擇題Which command sets and automatically encrypts the privileged enable mode password?()

A.enbale password c1sco
B.secret enable c1sco
C.password enable c1sco
D.enable secret c1sco

2.單項選擇題Which statement is true?()

A.An IPv6 address is 64 b long and is represented as hexadecimal characters.
B.An IPv6 address is 32 b long and is represented as decimal digits.
C.An IPv6 address is 128 b long and is represented as decimal digits.
D.An IPv6 address is 128 b long and is represented as hexadecimal characters

4.多項選擇題What are the two results of this configuration? ()

A.The default route should have a next hop address of 64.100.0.3.
B.Hosts on the LAN that is connected to FastEthernet 0/1 are using public IP addressing.
C.The address of the subnet segment with the WWW server will support seven more servers.
D.The addressing scheme allows users on the Internet to access the WWW server.
E.Hosts on the LAN that is connected to FastEthernet 0/1 will not be able to access the Internet without address translation.

5.多項選擇題What are two reasons a network administrator would use CDP? ()

A.to verify the type of cable interconnecting two devices
B.to determine the status of network services on a remote device
C.to obtain VLAN information from directly connected switches
D.to verify Layer 2 connectivity between two devices when Layer 3 fails
E.to obtain the IP address of a connected device in order to telnet to the device
F.to determine the status of the routing protocols between directly connected routers

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